SIST EN 2591-219:2004

Overview

SIST EN 2591-219:2004 is a European standard developed for the aerospace sector specifying a reliable test method to determine the voltage strength of insulated terminal lugs and in-line splices. Insulated terminal lugs and in-line splices are crucial elements of electrical and optical connection systems in aerospace applications. Ensuring their electrical integrity under various operating conditions contributes to the overall safety and performance of aircraft electrical systems.

This standard forms part of the wider EN 2591 series, offering a harmonized approach for testing and qualifying interconnection components used in demanding aerospace environments. The method defined in SIST EN 2591-219:2004 is to be used in conjunction with EN 2591-100, which outlines general requirements for testing electrical and optical connection elements.

Key Topics

• Scope and Purpose: Specifies the procedure for checking the voltage strength of insulated terminal lugs and in-line splices to ensure they maintain insulation integrity when subjected to high voltage.
• Preparation of Specimens: Outlines steps for preparing test samples, including accessory fitting and proper wiring, according to technical specifications.
• Test Methodology: Describes the immersion of crimped components in a conductive aqueous solution and the application of a gradually increased test voltage to verify insulation strength and detect any breakdown.
• Acceptance Criteria: Establishes that no burn-out or failure of insulation should occur during or after the test period.
• Referencing System: Requires adherence to EN 2591-100 for general procedures, ensuring consistency across all related tests in the EN 2591 series.

Applications

The standardized test method detailed in SIST EN 2591-219:2004 is applicable across several contexts in the aerospace industry:

• Aircraft Electrical Systems: Used by manufacturers and maintenance organizations to qualify and validate the safety and reliability of electrical connections in aircraft.
• Component Suppliers: Facilitates the compliance of terminal lugs and in-line splices with international standards, enhancing market acceptance and compatibility.
• Quality Control and Certification: Assists laboratories and certification bodies in conducting uniform testing for electrical connectivity parts, ensuring adherence to aerospace quality and safety requirements.
• System Integration: Provides system integrators with confidence that terminal ends and splices will withstand operational voltages without insulation failure, reducing risk throughout the aircraft lifecycle.

By standardizing the voltage strength test method, this document ensures that essential components deliver robust performance, helping to prevent electrical failures and support overall aircraft reliability.

Related Standards

• EN 2591-100: Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General. EN 2591-100 provides core requirements and general methods referenced in all specific test methods in the EN 2591 series.
• EN 2591 Series: A comprehensive range of standards for test methods covering various aspects of electrical and optical connectors in aerospace applications, including contact retention, insulation resistance, and mechanical features.
• IEC and ISO Standards: Other international standards may complement or reference the procedures in SIST EN 2591-219:2004 for broader conformity in electrical component testing beyond aerospace-specific contexts.

Keywords: voltage strength, insulated terminal lugs, in-line splices, aerospace electrical connectors, test methods, SIST EN 2591-219:2004, EN 2591-100, insulation integrity, aircraft electrical systems, aerospace standards.